Advances in hydrogen production from electrocatalytic seawater splitting

Wang, Cheng; Shang, Hongyuan; Jin, Liujun; Xu, Hui; Du, Yukou

doi:10.1039/d1nr00784j

Cited by 127 publications

(82 citation statements)

References 164 publications

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“…184,186,[203][204][205] According to the source of electrons, water splitting can be divided into electrocatalysis and photocatalysis. The electrons in the former come from an external circuit, 26,206,207 while the electrons in the latter come from the separation of electrons and holes triggered by light irradiation on a photocatalyst. [208][209][210] Cl À in NaCl solution can be oxidized into Cl 2 and OCl À at the anode under acidic and basic conditions, instead of O 2 evolution by the oxidation of water.…”

Section: Development Of Nacl-based Electrolytes For Producing Hydrogenmentioning

confidence: 99%

A review of sodium chloride-based electrolytes and materials for electrochemical energy technology

Wei

Chen

et al. 2022

J. Mater. Chem. A

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Section: Development Of Nacl-based Electrolytes For Producing Hydrogenmentioning

confidence: 99%

A review of sodium chloride-based electrolytes and materials for electrochemical energy technology

Wei

Chen

et al. 2022

J. Mater. Chem. A

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“…[ 2 ] Owing to the richness of seawater reserves on earth far beyond freshwater resources, the development of seawater electrolysis is essential for sustainable, green and efficient H 2 production. [ 3 ] Nevertheless, the sluggish kinetics and high‐energy process of anodic oxygen evolution reaction (OER) severely hinder the efficiency of seawater electrolysis. [ 4 ] Besides, the inevitable competition between OER and chlorine evolution reaction (CER) as well as the erosion effect caused by CER also hamper the further development for seawater electrolysis technology.…”

Section: Introductionmentioning

confidence: 99%

In Situ Reconstruction of Partially Hydroxylated Porous Rh Metallene for Ethylene Glycol‐Assisted Seawater Splitting

Mao

Deng

et al. 2022

Adv Funct Materials

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Designing efficient and durable electrocatalysts for seawater electrolysis shows a great research prospect, but it remains a significant challenge. Herein, we report the partially hydroxylated Rh metallene (Rh/RhOOH metallene) with porous, ultrathin, defect‐rich and hetero‐phase structure for ethylene glycol (EG)‐assisted seawater electrolysis. In parallel, the unique redox effect of RhOOH species and EG as well as the electroreduction effect riggers the in situ reconstruction for the catalyst during electrocatalysis, which further produces active Rh species to optimize the catalytic activity center and surface catalytic reaction. Benefiting from the unique metallene structure and the Rh/RhOOH heterogeneous structure, the Rh/RhOOH metallene exhibits superior electrocatalytic performance towards hydrogen evolution reaction (HER, overpotential of 29 mV) and EG oxidation reaction (EGOR, specific activity of 1.051 mA cm–2). Encouragingly, in the constructed EG‐assisted seawater electrolysis system, the Rh/RhOOH metallene only needs a low cell voltage of 0.678 V to achieve a current density of 10 mA cm–2 for energy‐saving H2 production, which significantly reduces energy consumption compared to conventional seawater electrolysis.

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“…Nowadays, industrial contamination, climate change, and population growth are all resulting in a shortage of clean water supplies. According to the state of global water 2 of 17 resources, 97% of the water on earth is seawater, which contains 3.0 to 5.0% salts [10][11][12]. If the seawater could be directly decomposed, the abundant seawater resources on Earth could be used as an economical, almost infinite, and environmentally friendly energy source.…”

Section: Introductionmentioning

confidence: 99%

High Selectivity Electrocatalysts for Oxygen Evolution Reaction and Anti-Chlorine Corrosion Strategies in Seawater Splitting

et al. 2022

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Seawater is one of the most abundant and clean hydrogen atom resources on our planet, so hydrogen production from seawater splitting has notable advantages. Direct electrolysis of seawater would not be in competition with growing demands for pure water. Using green electricity generated from renewable sources (e.g., solar, tidal, and wind energies), the direct electrolytic splitting of seawater into hydrogen and oxygen is a potentially attractive technology under the framework of carbon-neutral energy production. High selectivity and efficiency, as well as stable electrocatalysts, are prerequisites to facilitate the practical applications of seawater splitting. Even though the oxygen evolution reaction (OER) is thermodynamically favorable, the most desirable reaction process, the four-electron reaction, exhibits a high energy barrier. Furthermore, due to the presence of a high concentration of chloride ions (Cl−) in seawater, chlorine evolution reactions involving two electrons are more competitive. Therefore, intensive research efforts have been devoted to optimizing the design and construction of highly efficient and anticorrosive OER electrocatalysts. Based on this, in this review, we summarize the progress of recent research in advanced electrocatalysts for seawater splitting, with an emphasis on their remarkable OER selectivity and distinguished anti-chlorine corrosion performance, including the recent progress in seawater OER electrocatalysts with their corresponding optimized strategies. The future perspectives for the development of seawater-splitting electrocatalysts are also demonstrated.

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Advances in hydrogen production from electrocatalytic seawater splitting

Abstract: As one of the most abundant resources on the earth, seawater is not only the promising electrolyte for industrial hydrogen production trough electrolysis, but also of great significance for the...

Cited by 127 publications

References 164 publications

A review of sodium chloride-based electrolytes and materials for electrochemical energy technology

A review of sodium chloride-based electrolytes and materials for electrochemical energy technology

In Situ Reconstruction of Partially Hydroxylated Porous Rh Metallene for Ethylene Glycol‐Assisted Seawater Splitting

High Selectivity Electrocatalysts for Oxygen Evolution Reaction and Anti-Chlorine Corrosion Strategies in Seawater Splitting

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